Cutitcrcbra and its Allies in the British Museum. 391 



BoGKRiA, gen. nov. 



Large, compact, and thick-set flies, resembling Cutiterehra in 

 general a|)i)caraiice, but with the arista bare and the tarsi, or 

 at least the front and niiddh; j)aira, not expanded. 



Allied to nof/ctihnfera, Brauer (Verii. k. k. z.-b. Ges. Wien, 

 18G3, and ' Monographie der Oestriden,' 1863, pp. 215-216), 

 but differing as follows : — Profile of the head much more 

 nearly semicircular than that of Uocjenhofera as shown in 

 Brauer's figure (' Monographic,' &c. tab. iv. fig. 8 a) ; viewed 

 from in front the outline of the head much more nearly circular 

 than that of Rogenhofera as figured by Brauer (* Mono- 

 graphic,' &c. tab. vi. fig. 14) ; eyes occupying rather more 

 than the upper half of the head in profile, but not projecting 

 above the vertex — rather on a slightly lower level when 

 viewed from in front ; with the head in its natural position, 

 no space visible between it and the thorax, when the insect 

 is viewed from the side ; antennary pit small, in length equal 

 to about one fourth of the greatest length of the eyes, and, 

 when the head is viewed from in front, extending from a 

 point opposite the centre of the inner margin of the eye to 

 another slightly lower than the middle of the lower half of 

 the latter ; anteniue small, first two joints very short, third 

 joint rounded at the tip, rather longer than the jirst two joints 

 taken together ; arista short, stout, tapering only at the tip, 

 first segment somewhat elongated and arising from the third 

 joint of the antennae at a point about one third of its length 

 from the base ; proboscis short, concealed in the oral cleft, at 

 least in the typical species ; occipital orbits very conspicuous ; 

 Jirst pair of legs slender, the tarsi not expanded ; middle and 

 posterior legs, though stouter, with tarsi but slightly dilated, 

 scarcely broader than the tibiae, their middle joints ovate, not 

 semilunar; wings shorter than in llogenhofera, tapering to 

 their tips, with no appendix to the angle of the fourth vein ; 

 alulw large, quadrate, with the anterior atigles rounded, very 

 prominent when tiie wings arc at rest ; abdomen bluntly 

 conical, the basal angles rounded off abruptly. 



Pupa-case viewed from above subjjyriform, much more 

 regular in outline than that of Cutiterehra, since the segments 

 bear no ridges as in the genus alluded to ; viewed from the 

 side, ti)e under surface slightly concave, the upper strongly 

 convex ; upper surface of the first four segments forming a 

 cap {" Deckel "), as in Cutiterebra, to facilitate the escape of 

 tiie imago ; terminal segment concealed in a narrow trans- 

 verse slit, bearing a notch on the lower instead of the upper 

 margin, as in Cutiterebra; the eighth segment the longest; 



